The band's style can go under latin metal, alternative metal, and nu metal. Although, their 2012 album titled Epidemia was mostly more metalcore. Ill Niño was founded in 1998 by drummer Dave Chavarri and released a 4 song demo that year with Jorge Rosado (formerly of Merauder) on vocals and Cristian Machado playing bass. The next year, they parted ways with Rosado, and started looking for a new vocalist, but ultimately decided that the best decision was for Machado to step up to vocals.

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